Finding the Third Proportional to 406,422 and 632,900

Step by Step Solution

1. Step 1: Write the proportion equation
   406,422 : 632,900 = 632,900 : x
2. Step 2: Convert to fraction form
   406,422/632,900 = 632,900/x
3. Step 3: Cross multiply
   406,422x = 632,900 × 632,900
4. Step 4: Simplify right side
   406,422x = 400,562,410,000
5. Step 5: Solve for x
   x = 400,562,410,000/406,422
6. Step 6: Final answer
   x = 985,582.50